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The two-mode Silverados, equipped with Vortec 6.0-liter V-8 engines, achieve an EPA estimated 21 MPG city and 22 MPG highway, which represents about a 40 percent reduction in fuel use compared with similarly sized and powered pickup.

The trucks can accelerate up to about 30 miles per hour on electricity alone, assuming a very light foot on the gas pedal. In this mode, the Silverados are acting as if V-4s are under the hood.